Field type available in project set up that connect a text field to a controlled authority, such as the Getty Art and Architecture Thesaurus or the Library of Congress. The Getty’s vocabularies Art and Architecture Thesaurus (AAT), Thesaurus of Geographic Names (TGN), and Union List of Artist Names (ULAN) are fully integrated with Shared Shelf and are selectable for linked fields. Other authorities can be linked as well using the website’s URL.